Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbbeecb1c1a678ab…

MALICIOUS

PDF

33.9 KB Created: 2021-07-04 17:25:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 4e56a60f7a80295fb2f4736c1e74023f SHA-1: 4ac413f9fe877d2b7b0cafedbb27662dea05e1bf SHA-256: bbbeecb1c1a678abbda78595cc2530681e13223b93cf7dca12b0317b6ecc115f
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are disguised as generators or hacks for popular games like Minecraft and Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the ML classifier strongly indicate malicious intent. The document body and extracted URLs suggest a lure to download potentially malicious files or engage in phishing for account credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • External URI info PDF_URI
    PDF contains an external URL action
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://netcdn.tw/app/479516143/minecraft-java-free-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/minecraft-alt-accounts-free_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/old-roblox-accounts-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/arrest-script-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-likes-and-fans_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-2021-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-after-effects-download-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-tiktok-hearts_GM835599320.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/auto-clicker-for-roblox-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/pink-paradigm-hack-created-by-lord-of-robux_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/install-roblox-free-for-pc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hack-download-2021-pc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hacks-for-roblox-phantom-forces-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-ninja-assassin-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-robux-giver-no-human-verification-on-pc_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-roblox-scripts-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-robux-birthday-glitch_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/dragon-ball-z-rage-roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306C 22448 bytes
SHA-256: b3a4bd71bc6a26f1dae0b118d17d011293c00d676369b61fa40a16a619cc186d
font_01_sfnt_off0000627c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627C 18136 bytes
SHA-256: 6eb1f737dc26468ab321cead5519c6da0f94fa913db2fdf5dfa3628eb349cd49

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